Select the correct answer. Which of the following statements is correct about quadratic number patterns?

A. The difference between terms is always positive.
B. The second difference is constant.
C. The first difference is constant.
D. The third difference is greater than zero.

Abox contains 1 plain pencil and 4 pens. a second box contains 5 color pencils and 5 crayons. one item from each box is chosen at random. what is the probability that a plain pencil from the first box and a color pencil from the second box are selected? write your answer as a fraction in simplest form.

Is the square root of 4 plus the square root of 16 rational?

Aconstruction worker has rope 9 m long he needs to cut it in pieces that are each 3 /5 m long how many such pieces can he cut without having any rope leftover?